cashe removal

I use mozilla Firefox, and update my homepage frequently. When doing so I find the "start page" is not updated, Asking expert about this I heard that my start page is in my computer's cache memory for 2 hours. To see the updated start page I need to remove the cache memory. In Mozilla's web forum i got info that CCleaner could do the job, but I see no menu option covering this option. Could any one help me how to clerar the cache?

This "expert" needs to get his or her head checked, because that's completely out to left field. There's no such thing as 2-hour computer cache memory. You're having a different problem.